Headphone



FIG. 1 is a perspective view of a headphone showing my new design;

FIG. 2 is a right side elevational view thereof, the left view being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a perspective view thereof, the person and cord portions are shown in broken lines for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a headphone, as shown and described. 